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Rhyolites as probes of the crust: examples from Tertiary volcanism in Arizona, southwestern U.S.A.

Published online by Cambridge University Press:  03 November 2011

Sonia Esperança  and
Thomas C. Moyer
Sonia Esperança
Affiliation:
Sonia Esperança, Department of Heritage and Resource Management, Victoria College-Rusden, Clayton, Victoria 3168, Australia
Thomas C. Moyer
Affiliation:
Thomas C. Moyer, Department of Geology, Vanderbilt University, Nashville, TN 37235, U.S.A.
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Abstract

Geochemical and isotopic data obtained from three bimodal basalt-rhyolite fields in west-central Arizona point to significant variation in the sources of the siliceous products despite petrological similarities between them. The studied fields, which straddle the boundary between the Basin and Range and Colorado Plateau physiographic provinces, include Castaneda Hills (CH) in the Basin and Range, Kaiser Spring (KS) in the Transition Zone, and Mount Floyd (MF) in the Colorado Plateau. Two types of rhyolite (high-silica [HSR] and low-silica [LSR]) occur as lavas in the KS and MF fields, whereas all analysed CH samples are HSR. These lavas generally post-date low-angle extension of the Basin and Range crust and become generally younger towards the Colorado Plateau. Our isotopic data illustrate that the CH rhyolites require a source with comparatively radiogenic Sr, that most rhyolites require a source with comparatively unradiogenic 206Pb/204Pb, and that the MF-HSR require a source with comparatively radiogenic Nd and 206Pb/204Pb. The isotopic data clearly indicate that the western Arizona rhyolites contain a large crustal component. Importantly, the Pb isotopic compositions of the rhyolites illustrate the transition between two crustal provinces identified by other workers on the basis of Nd and Pb isotopic studies of Proterozoic granites. The Sr, Nd, and Pb isotopic compositions of our rhyolites can be modelled by mixing a basaltic component with three hypothetical crustal end-members which themselves may be formed by mixing two crustal components. One crustal component, which is characterised by unradiogenic Pb and Sr, may be similar to the mafic gneiss xenoliths of Tule Tank on the Colorado Plateau. The second crustal component, which has more radiogenic Sr and Pb, may be similar to the Proterozoic Fenner Gneiss of southeastern California. This conceptual model indicates an apparent increase in the contribution of the depleted Tule Tank source from the Basin and Range onto the Colorado Plateau and accommodates the notion that there is an underlying consistency to the petrogeneses of the western Arizona rhyolites as suggested by their chemistry and mineralogy. Although the CH and KS lavas require only one crustal end-member, the MF-HSR and LSR require two isotopically distinct sources. This difference may be attributed to the homogenisation of diverse crustal lithologies by ductile stretching during crustal extension.

Keywords

rhyolitesbimodal volcanic fieldsSr, Nd, Pb isotopic compositionsArizona crust
Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 83 , Issue 1-2: Second Hutton Symposium: The Origin of Granites and Related Rocks , 1992 , pp. 347 - 359
Copyright
Copyright © Royal Society of Edinburgh 1992

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References

Anderson, C. A., Scholz, E. A. & Strobell, J. D. Jr 1955. Geology and ore deposits of the Bagdad area, Yavapai County, Arizona. US GEOL SURV PROF PAP 278.Google Scholar
Anderson, P. 1979. Proterozoic plate tectonic evolution of Arizona. ARIZONA GEOL SOC DIG 17, 17–55.Google Scholar
Bender, E. E. 1990. Geology of the Fenner Gneiss, Piute and Old Woman Mountains, San Bernadino County, California. M.Sc. thesis, Vanderbilt University, Tennessee.Google Scholar
Bennett, V. C. & DePaolo, D. J. 1987. Proterozoic crustal history of the western United States as determined by neodymium isotopic mapping. GEOL SOC AM BULL 99, 674–85.2.0.CO;2>CrossRefGoogle Scholar
Burt, D. M., Moyer, T. C. & Christiansen, E. H. 1981. Garnetand topaz-bearing rhyolites from near Burro Creek, Mohave County, Arizona—Possible significance. ARIZONA GEOL SOC DIG 13, 1–4.Google Scholar
Catanzaro, E. J., Murphy, T. J., Shields, W. R. & Garner, E. L. 1968. Absolute isotopic ratios of common equal-atom and radiogenic lead isotopic standards. J RES NAT BUR STAND SECT A 72, 261–7CrossRefGoogle Scholar
Condie, K. C. 1981. Precambrian rocks of the southwestern United States and adjacent areas of Mexico. NEW MEXICO BUR MINES MINER RESOUR RESOUR MAP 13, Scale 1:1,000,000.Google Scholar
Ebadi, J. & Johannes, W. 1991. Beginning of melting and first composition of melts in the system Qz-Ab-Or-H2O-CO2. CONTRIB MINERAL PETROL 106, 286–95.CrossRefGoogle Scholar
Esperança, S., Carlson, R. W. & Shirey, S. B. 1988. Lower crustal evolution under central Arizona: Sr, Nd and Pb isotopic and geochemical evidence from the mafic xenoliths of Camp Creek. EARTH PLANET SCI LETT 90, 26–40.CrossRefGoogle Scholar
Esperanç, S., Carlson, R. W. & Shirey, S. B. 1990. Reply to “Comment on: Lower crustal evolution under central Arizona: Sr, Nd and Pb isotopic and geochemical evidence from the mafic xenoliths of Camp Creek” by C.M. Johnson. EARTH PLANET SCI LETT 99, 406–9.CrossRefGoogle Scholar
Gans, P. B. 1987. An open-system, two-layer stretching model for the eastern Great Basin. TECTONICS 6, 1–12.CrossRefGoogle Scholar
Glazner, A. F. & Ussler, W. III, 1989. Crustal extension, crustal density, and the evolution of Cenozoic magmatism in the Basin and Range of the western United States, J GEOPHYS RES 94, 7952–60.CrossRefGoogle Scholar
Goff, F. E., Eddy, A. C. & Arney, B. H. 1983. Reconnaissance geologic strip map from Kingman to south of Bill Williams Mountain, Arizona. LOS ALAMOS NAT LAB PUB LA-9202-MAP.Google Scholar
Hanchar, J. M. 1991. Lower crustal xenoliths in Tertiary dikes, Old Woman Mountains area, southeastern California. M.Sc. Thesis, Vanderbilt University, Tennessee.Google Scholar
Hart, S. R. 1984. A large-scale isotope anomaly in the southern hemisphere mantle. NATURE 309, 753–7.CrossRefGoogle Scholar
Hauser, E. C., Gephart, J., Latham, T., Oliver, J., Kaufman, S., Brown, L. & Lucchitta, I. 1987. COCORP Arizona transect: Strong crustal reflections and offset Moho beneath the transition zone. GEOLOGY 15, 1103–6.Google Scholar
Huntoon, P. W. & Sears, J. W. 1975. Bright Angel and Eminence faults, eastern Grand Canyon, Arizona. GEOL SOC AM BULL 86, 465–72.2.0.CO;2>CrossRefGoogle Scholar
Johnson, C. M. 1990. Comment on “Lower crustal evolution under central Arizona: Sr, Nd and Pb isotopic and geochemical evidence from the mafic xenoliths of Camp Creek” by Esperança, S., Carlson, R. W. and Shirey, S. B.EARTH PLANET SCI LETT 99, 400–5.CrossRefGoogle Scholar
Kempton, P. D., Harmon, R. S., Hawkesworth, C. J. & Moorbath, S. 1990. Petrology and geochemistry of lower crustal granulites from the Geronimo Volcanic Field, southeastern Arizona. GEOCHIM COSMOCHIM ACTA 54, 3401–26.CrossRefGoogle Scholar
Lucchitta, I. & Suneson, N. H. 1985. Geologic map of the Artillery Peak Northwest quadrangle, Mohave County, Arizona. US GEOL SURV OPEN-FILE REP OF-85-277.CrossRefGoogle Scholar
Lucchitta, I. & Suneson, N. H. 1988. Geologic map of the Planet 2 SW quadrangle, Mohave County, Arizona. US GEOL SURV OPEN-FILE REP OF-88-547.CrossRefGoogle Scholar
Lucchitta, I. & Suneson, N. H. 1989. Geologic map of the Planet 2 NW quadrangle, Mohave County, Arizona. US GEOL SURV OPEN-FILE REP OF-89-673CrossRefGoogle Scholar
Luth, W. C., Jahns, R. H. & Tuttle, O. F. 1964. The granite system at pressures of 4 to 10 kilobars. J GEOPHYS RES 69, 759–73.CrossRefGoogle Scholar
Manhes, G., Minster, J. F. & Allegre, C. J. 1978. Comparative uranium-thorium-lead and rubidium-strontium study of the Saint Severin amphoterite: Consequences for early solar system chronology. EARTH PLANET SCI LETT 39, 14–24.CrossRefGoogle Scholar
McCarthy, J. & Thompson, G. A., 1988. Seismic imaging of extended crust with emphasis on the western United States. GEOL SOC AM BULL 100, 1361–74.2.3.CO;2>CrossRefGoogle Scholar
McCarthy, J., Larkin, S. P., Fuis, G. S., Simpson, R. W. & Howard, K. A. 1991. Anatomy of a metamorphic core complex: Seismic refraction/wide-angle reflection profiling in southeastern California and western Arizona. J. GEOPHYS RES 96, 12, 259–92.CrossRefGoogle Scholar
Moyer, T. C. 1986. The Pliocene Kaiser Spring (AZ) bimodal volcanic field: Geology, geochemistry, and petrogenesis. Ph.D. Dissertation, Arizona State University Tempe.Google Scholar
Moyer, T. C. 1990. Generalized geologic map of the Kaiser Spring volcanic field, Mohave County, Arizona. ARIZONA GEOL SURV CONTRIB MAP CM-90-C, SCALE 1:50,000.Google Scholar
Moyer, T. C. & Esperança, S. 1989a. Geochemical and isotopic variations in a bimodal magma system; The Kaiser Spring volcanic field, Arizona. J GEOPHYS RES 94, 7841–59.CrossRefGoogle Scholar
Moyer, T. C. & Esperança, S. 1989b. Petrologic and geochemical variations in basalts associated with bimodal volcanism in the Arizona transition zone: Preliminary results from Kaiser Spring. NEW MEXICO BUR MINES MINERAL RESOUR BULL 131, 198.Google Scholar
Moyer, T. C.,& Nealey, L. D. 1989. Regional compositional variations of late Tertiary bimodal rhyolite lavas across the Basin and Range/Colorado Plateau boundary in western Arizona. J GEOPHYS RES 94, 7799–816.CrossRefGoogle Scholar
Nealey, L. D. 1980. Geology of Mount Floyd and vicinity, Coconino County, Arizona. M.S. Thesis, North. Arizona University, Flagstaff.Google Scholar
Nealey, L. D. & Sheridan, M. F. 1991. Post-Laramide volcanic rocks of Arizona and northern Sonora, Mexico, and their inclusions. ARIZONA GEOL SOC DIG 17, 609–47.Google Scholar
Nealey, L. D. & Unruh, D. M. in press. Geochemistry and isotopic characteristics of deep crustal xenoliths from Tule Tank, San Francisco Volcanic Field, Northern Arizona. ARIZONA GEOL SOC GUIDE: The Proterozoic of Arizona.Google Scholar
Shackelford, T. J. 1980. Tertiary tectonic denudation of a Mesozoic-early Tertiary(?) gneiss complex, Rawhide Mountains, Arizona. GEOLOGY 8, 190–4.2.0.CO;2>CrossRefGoogle Scholar
Sherrod, D. R. 1988. Preliminary geologic map of the Monkeys Head quadrangle, Mohave and La Paz Counties, Arizona. US GEOL SURV OPEN-FILE REP OF-88-597.CrossRefGoogle Scholar
Shoemaker, E. M., Squires, R. L. & Abrams, M. J. 1978. Bright Angel and Mesa Butte fault systems of northern Arizona. In: Smith, R. B. & Eaton, G. P., Cenozoic Tectonics and Regional Geophysics of the Western Cordillera, 341–68. MEM GEOL SOC AM 152.Google Scholar
Stacey, J. S. & Kramers, J. D. 1975. Approximation of terrestrial lead isotope evolution by a two-stage model. EARTH PLANET SCI LETT 26, 207–21.CrossRefGoogle Scholar
Suneson, N. H. 1980. The origin of bimodal volcanism, west-central Arizona. Ph.D. Dissertation, University of California, Santa Barbara.Google Scholar
Suneson, N. H. & Lucchitta, I. 1979. K/Ar ages of Cenozoic volcanic rocks, west-central Arizona. ISOCHRON WEST 24, 25–9.Google Scholar
Suneson, N. H. & Lucchitta, I. 1983. Origin of bimodal volcanism, southern Basin and Range province, west-central Arizona. GEOL SOC AM BULL 94, 1005–19.2.0.CO;2>CrossRefGoogle Scholar
Thompson, R. N., Morrison, M. A., Hendry, G. L. & Parry, S. J. 1984. An assessment of the relative roles of crust and mantle in magma genesis: An elemental approach. PHILOS TRANS R SOC LONDON A310, 549–90.Google Scholar
Tuttle, O. F. & Bowen, N. L. 1958. Origin of granite in the light of experimental studies in the system NaAlSi3O8-KAlSi3O8-SiO2-H2O. GEOL SOC AM MEM 74.Google Scholar
Wernicke, B., 1981. Low-angle normal faults in the Basin and Range province-Nappe tectonics in an extending orogen. NATURE 291, 645–8.CrossRefGoogle Scholar
Wernicke, B. 1985. Uniform-sense simple shear of the continental lithosphere. CAN J EARTH SCI 22, 108–25.CrossRefGoogle Scholar
Wooden, J. L. & Miller, D. M. 1990. Chronologic and isotopic framework for early Proterozoic crustal evolution in the eastern Mojave Desert region, SE California. J GEOPHYS RES 95, 20, 133–46.Google Scholar
Wooden, J. L., Stacey, J. S., Doe, B., Howard, K. A. & Miller, D. M. 1988. Pb isotopic evidence for the formation of Proterozoic crust in the southwestern United States. In Ernst, W. (ed.) Metamorphism and crustal evolution of the western United States, Rubey Volume III, 68–86. Englewood Cliffs, NJ:Prentice-Hall.Google Scholar